Need to replace a 3com 24 port, with a 48 port Netgear ProSafe. Wrong GBIC.

I have a new NetGear ProSafe 48 port switch (GS748T) that needs to replace a 3Com 24 port 4400 SE SuperStack 3 (3C17206) switch.  It appears I bought the wrong GBIC connector for this situation and not sure what I need at this point.  This is the GBIC connector I got

This is the port in the back of the 3Com that the fiber cable is connected to

Here the fiber cable going into the 3Com.

This the GBIC connector I got.  (while inserted to the Netgear)

I saw now way that the fiber cable would insert into the GBIC connector I got.  This is not exactly my specialty.

Any suggestions here?  Do I just need a different connector for the Netgear?